Results 31 to 40 of about 39,348 (284)
Acoustical Streaming in the Vicinity of a Cylinder [PDF]
The Journal of the Acoustical Society of America, 1954 Apparently contradictory reports in the literature concerning the acoustic streaming around a right-circular cylinder immersed in a viscous, incompressible fluid can be reconciled by reference to a universal curve giving (δDC/a) as a function of (a/δAC), where δDC is the DC boundary-layer thickness, δAC is the AC boundary-layer thickness, and a is the ...
W. P. Raney +2 more
openaire +1 more source
Theoretical and experimental characterizations of gigahertz acoustic streaming in microscale fluids
Nanotechnology and Precision Engineering, 2019 Even as gigahertz (GHz) acoustic streaming has developed into a multi-functional platform technology for biochemical applications, including ultrafast microfluidic mixing, microparticle operations, and cellar or vesicle surgery, its theoretical ...
Weiwei Cui +4 more
doaj +1 more source
Micromachines, 2022 In this study, we realize acoustic aggregation and separation of microparticles in fluid channels driven by standing Lamb waves of a 300-μm-thick double-side polished lithium-niobate (LiNbO3) plate.
Jin-Chen Hsu, Chih-Yu Chang
doaj +1 more source
Degeneration of flow pattern in acousto-elastic flow through sharp-edge microchannels
Ultrasonics Sonochemistry, 2023 Acoustic streaming (AS) is the steady time-averaged flow generated by acoustic field, which has been widely used in enhancing mixing and particle manipulation.
Yuwen Lu +4 more
doaj +1 more source
Micromachines, 2019 Two-dimensional acoustofluidic fields in an ultrasonic chamber actuated by segmented ring-shaped vibration sources with different excitation phases are simulated by COMSOL Multiphysics.
Qiang Tang +3 more
doaj +1 more source
Concentration of Microparticles Using Flexural Acoustic Wave in Sessile Droplets
Sensors, 2022 Acoustic manipulation of microparticles and cells has attracted growing interest in biomedical applications. In particular, the use of acoustic waves to concentrate particles plays an important role in enhancing the detection process by biosensors. Here,
Tao Peng +3 more
doaj +1 more source
Effect of β-PVDF Piezoelectric Transducers’ Positioning on the Acoustic Streaming Flows
Micromachines, 2014 This paper reports the numerical and experimental analysis of the acoustic streaming effect in a fluidic domain. The actuation of a piezoelectric transducer generates acoustic waves that propagate to the fluids, generating pressure gradients that induce ...
Susana O. Catarino +2 more
doaj +1 more source
Characterization of Acoustic Streaming in Gradients of Density and Compressibility [PDF]
Suppression of boundary-driven Rayleigh streaming has recently been demonstrated for fluids of spatial inhomogeneity in density and compressibility owing to the competition between the boundary-layer-induced streaming stress and the inhomogeneity-induced
Augustsson, Per +3 more
core +1 more source
Different origins of acoustic streaming at resonance [PDF]
Proceedings of Meetings on Acoustics, 2018 Acoustic streaming is a nonlinear phenomenon that plays an essential role in microscale acoustofluidic devices for handling of sub-micrometer particles. However, the streaming patterns observed in experiments can be of complicated and non-intuitive character, and therefore, experiments, and device optimization are often carried out in a trial-and-error
Bach, Jacob Søberg, Bruus, Henrik
openaire +2 more sources
Acoustic Streaming and Its Applications
Fluids, 2018 Broadly speaking, acoustic streaming is generated by a nonlinear acoustic wave with a finite amplitude propagating in a viscid fluid. The fluid volume elements of molecules, d V , are forced to oscillate at the same frequency as the incident ...
Junru Wu
doaj +1 more source